Any of a set of two or more numbers used to determine the position of a point, line, curve, or plane in a space of a given dimension with respect to a system of lines or other fixed references.
8
votes
3answers
293 views
Given a set of coordinates, how can I calculate the minimum bounds?
I have a set of coordinates in lon/lat. There are always at least 3 ordered coordinates that form a poly (if they were projected flat). How can I calculate the minimum bounds for these coordinates as ...
2
votes
1answer
66 views
Latitude and Longitudes are replaced with zeros when importing excel 2007 worksheet into personal geodatabase
I am trying to import an Excel 2007 data set into a personal geodatabase so I can convert coordinate systems. The data set includes point locations in Decimal Degrees. When I import the Excel ...
3
votes
2answers
144 views
Converting lat lon into co-ordinates (in ft of m)
I have a set of latitude and longitude of a series of points which specific the trajectory of a vehicle.
If I consider the first point as the origin (0,0), is it possible to convert the trajectory ...
6
votes
1answer
297 views
How to get latitude, longitude and altitude database from a GeoTIFF file?
I am developing an AR iOS application. When the iPhone gets the current location, it has to calculate locally the visible point. I want to read the tiff files in my application, and then get the ...
0
votes
1answer
259 views
How to adjust the difference between the coordinate from OpenStreetMap and Google Maps
I have downloaded the OSM from OpenStreeMap that came with all nodes from the map and their respective coordinates. Now I have to plot a node (latitude and longitude) on Google Maps, but all ...
4
votes
2answers
528 views
Coordinates(Latitude, Longitude) are different at same place on iPhone and Android devices, why?
I used HTML5 code for getting coordinates on Android (HTC desire s) with GPS enabled and iPhone (3gs). But the latitude and longitude are different on both devices at same place, why?.
Difference ...
1
vote
1answer
149 views
Retrieving XY from point graphics set in WPF network (arcgis 10.0)
I have a WPF application using ArcGIS 10. In the application I can set two point by clicking on map and calculate route between them. every time I click on the map, The application creates a ...
1
vote
1answer
38 views
Obtaining coordinates when computing distance of a polygon to a line
I have a shapefile of a county. I am interested in computing its distance to a line, which I've been doing using Near. I want to know the coordinates on the line that produces the minimum distance. ...
1
vote
1answer
215 views
Using SRTM data, how to get the coordinates of the peaks visible from a location?
Using SRTM data and a coordinate-altitude database of the peaks, I want to get the coordinates of the visible peaks from my location. I want to make an application similar to this.
How is this ...
5
votes
3answers
235 views
Is there a tool to add “noise” to overlapping X, Y coordinates so they are no longer in the EXACT same place?
I have a series of points representing animal observations. Many of them overlap, having the exact same coordinates, and this is causing me trouble when I want to run some analytical tools which ...
1
vote
1answer
243 views
USA Contiguous Albers Equal Area Conic
How do you convert from USA Contiguous Albers Equal Area Conic to meters? Or, to latitude and longitude?
I am using ArcGIS 10.1, and within it, ArcMap. The shapefile I have reports the coordinates ...
2
votes
1answer
467 views
Convert X Y Pixels to Easting Northing
Hopefully someone can help.
I'm trying to find out what the formula would be to convert the X, Y of an image to the Easting and Northing coordinates.
I've downloaded some of the raster maps from OS ...
0
votes
0answers
63 views
Coordinates move in sql server insert
When I insert a row in TableA in sql server I use this for the geometry column:
geometry::STPolyFromText('POLYGON((x1,y1,x2,y2,x3,y3,x4,y4,x1,y1))', 3007)
You can find the definition for ...
0
votes
1answer
99 views
If the Earth was flat, what unit of measurement would distances between geographic points be represented as?
A whole lot of abstraction- given two longitude/latitude points given from a GPS, I'm using the Pythagorean distance formula to find the distance between them. What unit of length would the distance ...
1
vote
0answers
96 views
Google earth incorrectly rendering coordinates?
My circles are rendering funky on the poles, and along the equator.
Here are my coordinates:
158.05553767833,-78.151355482613
152.68654993135,-76.924955252783
147.72303124605,-75.713526831152
...
2
votes
2answers
291 views
How do I import specific Coordinates from Namibia in QGis?
I have a map here with Coordinates from the Schwarzeck Map Datum Format 1903. They have the following format
e.g.:
y: 41 944,31
x:363 810,71
I want these point to be pictured in QGis... how is it ...
1
vote
1answer
350 views
Change coordinates of a polygon
I wanted to know whether it is possible to change the coordinates of a Polygon by typing them in.
I don't want to have to manually drag them into the right position.
5
votes
4answers
3k views
How do I create point features with exact (manually entered) coordinates?
How do I create point features with exact (manually entered) coordinates i Quantum GIS (QGIS)?
I get precise gps coordinates from a survey team which I need to add to a point layer. What I want: -Add ...
3
votes
1answer
103 views
Enter 4 Coordinates and get a Polygon QGIS
Is it possible to enter 4 Coordinates for getting a Polygon.
I have to Clip lots of exact rectangles and i was just wondering wether you know a plugin.
Thanks a lot
danke!
Alex
0
votes
2answers
281 views
How to find the proper coordinate reference system with two sets of data using different measurements or too convert one system into another
I have two different entries of data in two different spread sheets. One of the spread sheets uses a coordinate reference system that I have no idea what the units of measurement are. the properties ...
5
votes
1answer
90 views
Sending coordinates via VHF Radios to Computers
I need to send and receive coordinates in NMEA format from a VHF radio to a computer.
Any suggestions where to look in order to accomplish this task?
The transmission will occur only when the user ...
1
vote
0answers
119 views
How to get x and y coordinate values of an annotational featureclass
I am able to get the x and y coordinate values from point, polyline, polygon and multipoint type featureclasses. However, I am unable to export x and y coordinate values of an annotational ...
2
votes
3answers
868 views
Convert coordinates to geometry (polygon) using QGIS
I have an Excel sheet with grid data including geographical coordinates. I know that the coordinates represent areas, i.e., a multi(polygon). However, the data lacks geometry information. I'm looking ...
0
votes
0answers
17 views
World country borders in polygon geometry format [duplicate]
Possible Duplicate:
Where do I get territories data?
Is there some source I can get all world countries polygon geometry points with latitude and longitude? I find it for USA states but ...
0
votes
0answers
95 views
MapFish Print latitude, longitude innacuracy?
I'm new to GIS so this may be trivial: I'm using MapFish Print to create some PNG. I have issues to place the viewport. When I use a random GPS coordinate: -20.904522,55.475106 which seem to point ...
1
vote
0answers
84 views
Is there a ModestMaps or other flex library for finding the distance between 2 lat/lon coordinates?
I'm using ModestMaps in my Adobe Flex application. Is there a flex library method to calculate the distance between two of my lat/lon coordinates, or am I stuck coding the Haversine by hand? I've ...
1
vote
0answers
104 views
gdallocationinfo from C++?
I need a C++ API to convert x,y Image Coordinates in their native projection to output image pixel,line coordnates. I see the gdallocationinfo documentation, but no API for it.
Where in online GDAL ...
3
votes
2answers
598 views
How can i select a polygon in MS SQL 2008
I am very new to MS SQL 2008. I got a task to select a polygon from the polygon layer by giving the X-Y coordinates. I already got the script for PostgreSQL for the same thing, but i need it for MS ...
1
vote
1answer
131 views
0
votes
1answer
225 views
To get attribute data of polygon layer by giving Lat/Lon
Is anyone having an idea about how to get attribute data of a polygon layer by giving Coordinates with in that polygon. Here i have tried with these codes..
SELECT * FROM kar_bbmp_198 WHERE ...
1
vote
0answers
23 views
Translate geographical coordinate [duplicate]
Possible Duplicate:
Calculating Lat/Lng X miles from point
I would like to know how could I translate a geographical coordinate to an specific distance. So for example let's suppose I'm ...
3
votes
2answers
639 views
Update point coordinates in QGIS after manually moving locations in edit mode
I have imported point coordinates from a database, but I need to manually adjust a lot of the locations. Is there a way for QGIS to automatically update the point locations in the attribute table ...
1
vote
0answers
105 views
Natural Earth: How to get the position of each country?
I've just split the 1:10m Natural Earth countries into individual JSON files which I plan to render and partially stitch back together using RaphaelJS. The 1:10m map is very big (10mb or so) so ...
2
votes
2answers
2k views
Calculate bearing between two decimal GPS coordinates
I'm building a virtual tour application that uses custom panoramas in conjunction with Google's StreetView service. With StreetView, you can have 1 to n links at each particular location to move to, ...
1
vote
1answer
662 views
Dynamic scale bar, coordinates and grid for map frame in Mapinfo map layout
I believe dynamic scale bar and coordinates (grid) for map frame in map layout are BASIC things which Mapinfo (GIS software for thousands dollars) should allow me to do. To make it clear I am talking ...
1
vote
1answer
309 views
Aligning coordinate systems: gpx, LiDAR, shapefile
I am working on a project based on a lidar data set (for use in LidarViewer in Linux, a basic x,y,z viewer) that was downloaded from #1 below at Opentopo.org and looking to add onto this data set with ...
2
votes
1answer
495 views
Plotting latitude on to a (Mercator projection) SVG representing a country map
I want to convert (google sourced) longitude and latitude coordinates to x and y to place points on a SVG map
I can get the longitude converted to X but I can't nail latitude.
...
7
votes
1answer
538 views
Computational most efficient way to convert Cartesian to Geodetic Coordinates
As far as I understand the literature there are several ways to convert a set of geoecentric cartesian coordinates to geodetic coordinates
Bowring, 1976
Borkowski, 1989
Lin & Wang, 1995
Toms, ...
4
votes
2answers
620 views
How to update geometry in ArcObjects?
I'm just starting with ArcObjects and I want to update coordinates of geometry vertices. Specifically, I want to swap X, Y coordinates for each vertex of polygons (which can be multipart and have ...
2
votes
2answers
233 views
How to transform Lambert coordinates in C#?
I want to transform Lambert (EPSG:3035) coordinates to EPSG:4326 in C#.
I have tried this:
var lambert = cf.CreateFromWkt("PROJCS[\"ETRS89 / ETRS-LAEA\",GEOGCS[\"ETRS89
...
0
votes
3answers
2k views
Get geometry from coordinates
I have a table with geometry column called point, saved in SRID 4326. I want to get the geometry by its coordinates, but something didn't work. I suspect database configuration or something.
Here is ...
2
votes
1answer
186 views
How do you calculate positional accuracy in qgis?
How to you compare two layers in QGIS to get the positional accuracy?
7
votes
2answers
2k views
How to generate random locations nearby my location?
I am trying to create random locations nearby my location. What i want is to create random latitude/longitude pairs inside a 200 meters circle surrounding my location.
This is the formula i came up ...
0
votes
0answers
36 views
How we add XY coordinates (in the attribut table) from shapefile (points) using QGIS? [duplicate]
Possible Duplicate:
How to get the coordinates in Lat/long from a point layer?
I created a new shape file and edited to add points at specific location. Now, I would like to extract the XY ...
2
votes
2answers
202 views
C++ coordinate class that automates projection?
Can anyone point me to a C++ class for representing coordinates that automatically handles projection transforms? What I'm thinking of is something that would allow me to create vars that incorporate ...
1
vote
2answers
317 views
Java GIS framework with custom shaped markers
I am completely new to GIS theme and I found this board so I hope I can get good advices from experienced users. I need to find an open-source Java framework/library/api that would generate an map ...
2
votes
9answers
4k views
Creating shape file from file with coordinates
How can I make a shape file of an csv file with coordinates?
2
votes
1answer
1k views
Trying to set the OpenLayers MouseOver position to be outside the Map
This is my code and I am trying to obtain the MouseOver to be displayed outside the Map container.
<!DOCTYPE html>
<html>
<head>
<title>My Map</title>
...
2
votes
1answer
620 views
Converting map coordinates using AutoCad to Excel sheet
I have some maps of pieces of lands and I want to convert the coordinates to excel sheet
I want to arrange the data like this in the excel sheet:
land number( the pink number in the pic) ...
17
votes
1answer
2k views
Is WGS84 itself a Coordinate Reference System?
I was wondering the difference between WGS84 and EPSG:4326 (see this).
Can then WGS84 on its own be defined as a Coordinate Reference System?
Or is it just a datum so that a Coordinate System must ...
